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| author |   Stefano Stabellini <stefano.stabellini@xilinx.com> | 2021-03-19 13:01:40 -0700 |
|---|---|---|
| committer |   Juergen Gross <jgross@suse.com> | 2021-04-23 11:33:50 +0200 |
| commit | f5079a9a2a31607a2343e544e9182ce35b030578 (patch) | |
| tree | 845187f971beecc8c97874a6789a4661e3951056 /arch/arm64/mm/dma-mapping.c | |
| parent | xen-pciback: simplify vpci's find hook (diff) | |
| download | linux-dev-f5079a9a2a31607a2343e544e9182ce35b030578.tar.xz linux-dev-f5079a9a2a31607a2343e544e9182ce35b030578.zip | |
xen/arm: introduce XENFEAT_direct_mapped and XENFEAT_not_direct_mapped
Newer Xen versions expose two Xen feature flags to tell us if the domain
is directly mapped or not. Only when a domain is directly mapped it
makes sense to enable swiotlb-xen on ARM.
Introduce a function on ARM to check the new Xen feature flags and also
to deal with the legacy case. Call the function xen_swiotlb_detect.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210319200140.12512-1-sstabellini@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/arm64/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 93e87b287556..4bf1dd3eb041 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -53,7 +53,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, iommu_setup_dma_ops(dev, dma_base, size); #ifdef CONFIG_XEN - if (xen_initial_domain()) + if (xen_swiotlb_detect()) dev->dma_ops = &xen_swiotlb_dma_ops; #endif } |